Journal
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
Volume 152, Issue 2, Pages 215-220Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2004.03.027
Keywords
cutting fluid concentrate; dilution; hard water; cutting fluid emulsion; stability
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A cutting fluid concentrate has been formulated from a paraffinic oil, a hard water, NlonoEthanolamine Borate (MEAB) and a cationic/nonionic surfactant mixture. Its dilution with hard water yields very stable oil-in-water emulsions, the so-called cutting fluid emulsion, with an average droplet diameter of 50 nm, independently of both the hardness of water and the weight ratio of hard water to concentrate. The high stability of these emulsions results from the existence of a strong repulsive potential between droplets which is caused in particular by the presence of the cationic surfactant at their surface. From a practical point of view, the ability to produce stable cutting fluid emulsions for a wide range of dilution, whatever the hardness of water, might allow the user to fine-tune the lubricating and cooling abilities of the fluids and therefore optimize their performances during the metal working process. (C) 2004 Elsevier B.V. All rights reserved.
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